Elevator-control gear



(No Model.) 2 Sheets--Sheet 1.

T. W. HEERMANS.

ELBVATOR CONTROL GEAR.

No. 468,520 Patented Feb. 9,1892.

Y Ilm (No Model.) 2 Sheets-Sheet 2.

` T. W.` HBERMANS.

BLEVATOR CONTROL GEAR.

Patented Feb. 9

1 sus co., sumcmwo., msnmcm u c NITED STATES PATENT OFFICE.

TI'IADDEUS W. VIIEERMANS, OF CHICAGO, ILLINOIS, ASSIGNOR, BY MESNE ASSIGNMENTS, TO TIIE NATIONAL COMPANY, OF ILLINOIS.

ELEVATOR-CONTROL GEAR.

SPECIFICATION forming part of Letters Patent No. 468,520, dated February 9, 1892.

Application led December I9, 1887. Serial No. 258,296. (No model.)

To ctZZ whom, t may con/cern:

Be it known that I, THAnDEUs W. HEER- MANS, of Chicago, Cook county, Illinois, have invented certain new and useful Improvements in Elevator-Control Gears, of which the following is a specification.

My invention has for its object the provision of an apparatus for operating the controlvalve of an elevator from the elevator-car [o which shall be capable of gaging the extent as well as controlling the direction of the movement of the control-valve.

My invention is specially applicable to hydraulic elevators, because in its use water or r 5 other incompressible iiuid is necessary; but

it may also be used for steam-elevators.

My invention is shown as applied to a hydraulic elevator controlled bya pilot-valve like that shown in United States Letters Patzo ent No. 314,720 to George H. Reynolds, though it is of course applicable to any other sort of valve-gear.

My invention consists in the parts and combinations hereinafter described and claimed.

z 5 In the accompanying drawings, Figure 1 is a side View, partly in elevation and partly in section, of a hydraulic engine, an elevator-car, and so many of their connections as are needed to illustrate my invention. Fig.

3o 2 is a partial section of the branches 10 and 11 of pipe 9, Fig. 1. Fig. 3 is an end View of the operating parts in the car; and Fig. al is a side view of the same, partly in section, the front plate 27 and handle 26 being removed.

Fig. 5 is a section of the cylinder operating the control-valve. Y

2, Fig. l, is the elevator-engine, from which the cables '3 pass to the card4 over sheave 7 in the top of the shaft. A tank 6 supplies water to the engine through the pipe 32 and inlet-port 34 ot valve 5. In order not to conceal the controlling apparatus, the pipe 32 is broken away, and the exhaustpipe, which in practice is attached to the exhaust-port 33,

is not shown. From the tank G a pipe 9 eX- tends to about the middle of the elevatorshaft, its lower end terminating in two branches 10 and 1l. Check-valves 12 and 18 allow water to flow into said branches 10 and 5o 11, but not from them. The pipe 9 and valves 12 and lserve to keep the branches and the pipes and cylinders connected thereto always filled with water, but are not essential to the operation of the device for the reason that any other device for filling the operating cyl- 5 5 inders and tubes would be effective; but I prefer the device shown as being simple and requiring no attention. From branch 10 a pipe 16 extends to one end of the controlcylinder 18 and a flexible pipe 14E to one end 6o of the cylinder 2O on the car, said cylinder 20 being shown in Figs. 8 and 4l. From the other branch 11 pipes 17 and 15 extend to the other ends of cylinders 18 and 20, respectively. The piston of cylinder 20 (vde Fig. 65 Ll) consists ot' two disks 21 and 22, connected by a bar 19, upon which rackteeth are cut, a pinion 23 meshing therein. The pinion 28 is revolved by the handle 2G. The disk 27 covers the cylinder 2O and connections and 7o may have marked upon its face the words Up, Down, and Stop to indicate the f position in which to place the handle 2G. The piston in cylinder 18 (vde Fig. 5) is constructed in a similar manner, having disks 28 and 29 connected to bar 35, and the bar 35 carries a lug 30, Which projects through the side of the cylinder 18 and is attached to a rod 31, which moves the control or pilot valve. Set screws 32 and 33, projecting 8o through the ends of the cylinder 18, serve to adjust the limits of the movement ot disks 28 and 29. By reference to Fig. -l it will be seen that not only are pipes 14 and 15 connected to their respective ends of thecylinder 20, but that they are connected to each other through the plug-cock 24. Said cock is usually closed, and its use will appear when the operation of the apparatus is de- SGIbeCl. 9o

The operation-is as follows: IVe will suppose that the piston ot' cylinder 2O is moved to the left (ride Fig. 4) by the revolution of the handle 26 and pinion 23. The water in the left-hand end of cylinder 18 is forced out 95 and down through pipes 14C and 16 tothe lefthand end of cylinder 18, thereby forcing its piston to the right and moving the controlvalve. The water in the right end of cylinder 18 is at the same time forced into the corresponding end of cylinder 20. A movement ot the handle 26 in the opposite direction is in like manner followed by a movement of the control-valve in the opposite direction. It is desirable to have the position of the control-valve always correspond to certain fixed positions of the handle 26, and the plug-cock 24 is provided for adjusting and maintaining these relations. Thus if through unequal leakage or other cause the control-valve is not in its central position when the handle 26 is at its Stop or central position the error may be rectified by opening the plugcock 24, setting the control-valve at the point desired, and bringing the handle 26 to its corresponding position, the last-named adjustment not causing the control-valve to move, because the water is not forced through the pipes 14 and 15, but simply passes from one end to the other of cylinder 20. The cock 24 is then closed and the device again ready for use.

In the use of the term cylinder and piston in the subjoined claims I include and refer to any of the well-known means for communicatin g pressure to and for receivin g pressure from a column of fluid-such, foi-instance, as a flexible diaphragm.

I claiml. In an elevator, the combination of astationary valve through which the movement of the car is controlled, two expansible chamo bers having a common moving part connected with said valve to move the same in opposite directions, two expansible chambers upon the car, having a common moving part and means for operating it, and flexible pipes connecting the said chambers upon the car with the stationary chambers, substantially as described.

2. The combination, with the control-valve of an elevator, of a cylinder and piston operating the said control-valve, a cylinder and piston carried upon the car, and pipes connecting said cylinders, said pipes being filled with an incompressible fluid, substantially as described.

3. In an apparatus for operating the control-valve ofan elevator, the combination of a cylinder carriedby the elevator-car, a piston therein operated by a pinion meshing in the rack-bar joining the two disks of said piston, a piston and cylinder connected to said control-valve, and pipes connecting said cylinders and filled with an incompressible fluid, substantially as described.

THADDEUS lV. IIERMANS.

VitneSSes:

P. H. T. MASON, J. I. VERDER. 

